u.s. says military ground forces loyal to president gadhafi still pose a significant threat. on monday, president obama will address the nation on the libyan crisis. >>> disaster in japan. japan's prime minister describes the situation as grave and serious, after another dangerous radiation leak is found at the crippled fukushima nuclear power plant. u.s. navy barges are bringing fresh water to try to head off a meltdown "early" this saturday fresh water to try to head off a meltdown "early" this saturday morning, march 26th, 2011. captioning funded by cbs >>> welcome to a gorgeous spring morning in new york city. 20-something degrees. but who cares, it looks nice. >> that's a beautiful picture, russ. >> welcome to "the early show," i'm russ mitchell. >> and i'm rebecca jarvis. we begin with the latest on the battle for libya. rebels have recaptured the key eastern city of ajdabiya. nato takes control of some of the u.s.-led operation in libya in a matter of days, and president obama will